Baird X47DTV power supply issues

[gilly1984]

Re: Baird X47DTV power supply issues

Yh, only open to the trade. Gonna go there tomorrow and if they dont serve me i will wait for a trade person to come and ask them to go in for me.

Feel like a kid again.

[gilly1984]

Re: Baird X47DTV power supply issues

got my cap today.

I ordered varistors when I should of bought a thermistor.

are they completely different. would check myself but using phone is hard to check out datasheets.

if they are different I will just the old thermistor.

Tom, is a 100w bulb powerful enough to test for shorts using it in series with the psu.

[budm]

Re: Baird X47DTV power supply issues

Varistor (MOV) is voltage suppression device: http://en.wikipedia.org/wiki/Varistor
You cannot use that.
For 47" LCD TV, you will need 200 Watts lamps. You can try 100 Watts first.

[gilly1984]

Re: Baird X47DTV power supply issues

thanks budm. old thermistor back on then.

stick 2 100w bulbs in series.

if it blows up after all this I will put my head through the screen.

[tom66]

Re: Baird X47DTV power supply issues

If you can't fix it I'll buy it off you.

[gilly1984]

Re: Baird X47DTV power supply issues

deal.

[gilly1984]

Re: Baird X47DTV power supply issues

http://www.youtube.com/watch?v=CnM0JM8LObw

The things at the top disappeared after 2 mins? Would still like to know what they are.

[gilly1984]

Re: Baird X47DTV power supply issues

BTW, I only mention tom because he has helped a lot on this tv.

I appreciate all the help from everyone on this site.

Being a bright house tv i'm guessing its a tv mainly in the uk, so i understand if it was tom who contributed here the most.

I still love you all though so dont feel left out

[tom66]

Re: Baird X47DTV power supply issues

I have no experience with this chassis.... frankly, I don't want any!

It's a Proview chassis. Same crappy chassis as in Polaroid, Memorex et al.

I see what you are talking about. I've seen it before on an LG display (in an LG TV.) It's a temporary effect caused by the TV being off for a long time. Seems to be some settling in the panel due it being cold... not sure what causes it, but mine went away after having it on for an hour.

Pop, spark, not good. Would investigate unless you want to take it apart a month later to find another blown up FET, diode and controller.

[gilly1984]

Re: Baird X47DTV power supply issues

All screwed up now.

I had a look and couldnt find anything blown? Hoping it was just the surge of power to the new components, all voltages seem good.

Had to get a snap in cap and use some legs off another new cap to join it up.

I may of associated the pop with a spark, so seen a spark even though there was none. must be bonfire night making me go loopy.

[tom66]

Re: Baird X47DTV power supply issues

May have been the mains switch but I'd keep a careful eye on it. Enjoy your 47"!

My dad has permanently adopted the 50" NEC plasma I fixed. He was supposed to sell it, but he considers it an early birthday present

Is this a 1080p or 720p set?

[gilly1984]

Re: Baird X47DTV power supply issues

Not sure, not much information about it about.

Gonna guess its a 720p though, just because of the cheap mainboard.

Just put it in the front room now (bye sony 40"), looks no better than watching the last tv, just bigger.

Can't thank you enough tom, a real credit to badcaps.

Just this philips to sort now, bought a new cap for it but that didnt fix it.

Anyway, thats another day, i will update the philips thread when i have the screw drivers out.

[gilly1984]

Re: Baird X47DTV power supply issues

Quick pic of bodge job.

And the small ruby next to it is what i put in too, original looked very slightly bulged.

[tom66]

Re: Baird X47DTV power supply issues

Did you glue it down? I would glue it down, then solder (makes it easier.)

I bet you'll find you like the picture on the Sony 40" more, due to the better video processing. My argument with bigger screen sizes ... is to sit closer to the TV. My 24" monitor looks the same as a 32" from 6 feet. etc.

[gilly1984]

Re: Baird X47DTV power supply issues

To be honest i couldnt tell the difference in quality between the 37" hannspree we had compared to the 40" sony, now it looks just the same on the 47" Baird, just bigger.

Although i can see a big difference in the menu options. The sony had lots to play with, including auto backlight.

The only time i have seen a major difference on an lcd tv is when i went to a friends of a friends home to fix a pc, she had a Philips tv, it looked like i was watching real life lol, it was weird, maybe it had high hz or something? No idea, i wasnt into tvs at the time.

[tom66]

Re: Baird X47DTV power supply issues

Oh, high Hz does not make it look better, trust me. I have fixed a Samsung 100 Hz LCD and kept it. We all unanimously agreed to turn off the feature after about 5 minutes; it made everything look fake.

[gilly1984]

Re: Baird X47DTV power supply issues

Thats exactly how it looked, fake.

Oh, and no i didnt glue it down, the heatsink is over it, no where for it to move.

Thinking of modding the back to put a 120mm fan inbetween the psus.

[tom66]

Re: Baird X47DTV power supply issues

No need. It died due to poor 180uF, unlikely to be heat. If you open it up again for service, I would replace that other primary cap on the other PSU.

[gilly1984]

Re: Baird X47DTV power supply issues

unhappy.

watching TV this morning just fine, electric ran out and TV went off, put the electric back on and as soon as I did I heard a bang.

opened TV and the fuse has completely shattered.

checked for shorts but it seems fine still.

stupid question here but is it because I used a 2A fuse? and the surge of electric coming back on blew it?

scared to stick another fuse in now.

[tom66]

Re: Baird X47DTV power supply issues

Test the MOSFET. Did you repair that trace? Cap properly soldered in?